Adapter for cut-out blocks.



C. B. FITHIAN.

ADAPTER FOR CUT-OUT BLOCKS.

APPLICATION men FEB.20,1915.

mun; seam ll 1 III] nu INVENTOFZ Charla 1 J5. fi l/ 1 m ATTOR N EY To all whom it may concern:

Adapters for Cut Out Blocks, of the following is a specification.

UNITED sTAfirnS PATENT OFFICE.

CHARLES B. 'FITHLAN, OF PHILADELPHIA, PENNSYLVANIA, AssIGNoR. on ONE-mini;

'1'0 ALBERT GENTEL, 0F PHILADELPHIA, PENNSYLVANIA, ANDONE-THIRD TO IRA vIt. STANG-EB, OF PENSAUKEN, NEW JERSEY. i

ADAPTER FOR CUT-OUT BLQCKS.

Specification of Letters Patent.

Patented May 2,1916.

Application filed reb'ru r 'ao, 1915. Serial no. 9,535. I

Be it known that I, GHARLESB. FITHIA-N,

a citizen of the United States, residing at Philadelphia, in the county of Philadelph a and State of Pennsylvania, have invented certain new and useful Improvements-1n My invention relates to an. adapter for out out blocks, that is to say, to a device adapted to be used in an'electrical cut out block'designed for use with cartridge type fuses whereby a plug type fuse may be utilized'in'such cut out block.

Heretofore, cut out blocks have been mad in two main distinct types, one adapted for use with fuses of the type known to those skilled in the art as cartridge fuses, and the other adaptedfor usewith fuses of the type known as plug fuses. The cartridge type other reasons it is sometimes desirable to use a plug ock. w The obj ect'therefore' of my invention is to provide'a simple and eflicient device for insertion in a cut out block designed for car- .tridgetype fuses whereby fuses of the plug type may be utilized insuch a cut out block. 30

,The nature and characteristic features of myinvention will be more readily understood from the following description taken in connection with the; accompanying drawings forming part hereof, in which Figure 1 is "a top or plan view of a common form'of cut out block' designed for'use with cartridge type fuses but with the de= vice of my invention shown mounted therein; Fig. 2 is a longitudinal section thereof taken view-of-the adapter detached; and Fig. 5 is 'an underneath plan-.viewof the same.

. Referring to the .drawingsythecut out block there shown is of a common and well known type and comprises a suitably molded porcelain base 6'upon which the various parts are mounted, being provided with the usual metal connection terminal. plates 7.

Mounted in the base 6 and electrically con enacted with the terminal members Zafef which type f'usein a cartridge type fuse.

spring clips 8 which project upwardly from the block 6 and are adapted to receive and retain cartridge fuses, wl1 ich,'as*well known 'to' those skilled in the art, comprise cylin-.

drically shaped devices having external metal terminals adapted to be engaged in said spring clips 8 to thereby establish the having the internally arranged fusewire which is adapted to be blown when anexcess of current passes through the circuit. As these fuses are widely known and used, further description thereof is unnecessary.

i As before stated the purpose of the device electrical connection at each end thereof, and

of my invention-is to permit the use of plug :fuses in out out blocks adapted for use with cartridge typefuses. It is also, well known that the plug type fuse comprises a device principally formed of insulating material such as porcelain providing an interior vice is shownin Figs. 1, 2 and 3 of thedraw ings in operative relation in the adapter, the

external screw threaded metallic portion being'numbered 9 and the centrally arranged button being numbered 10. Further description of the fuse plug is. also unnecessary as these devices are well known in the -art,,be-

ing widely used and also varying somewhat in minor details of construction.

The device comprising the novel portion.

of my invention consists of a receptaclehaving an internal metallic portion 11 adapted to receive the fuse plu ,being complemental to the conformation t ereofand having a block 12 of porcelain or other suitableinsw A screw 13is centrally mounted in the insulating material mounted in the base thereof.

lating'blo'ck 12 and is provided with a head .14 whichsis-adapted to form a contact for the button l0 provided on the end of the ,fuseiplug; Secured to the screw 13 both I mechanicallyand electrically by means of a ino nut-1 5 is ;'a-fmetallic .member.' 16 whichbnerably cylindrical in conformation and of the same dimensions as the metallic end of the cartridge fuse which it is designed to oppositely disposed terminal lug 18 of conformation and dimensions similar to the ter, minal lug 17 but secured to and electrically connected with the lower continuation of the internal metallic portion 11. The terminal lugs 17 and 18 are prcferablyiarranged with their common axis offset from the plane of the vertical axis of the receptacle 11 which receives the fuse plug, this arrangement being provided so as to effectually separate the fuse plugs of the adjacent lines as will clearly appear from an inspection of Figs.

1 and-3 of the drawings. Theinner metallic portion 11 of the adapter'and also the downwardly extending portion 19 thereof are surrounded by a cylindrical shell or cover 21 of suitable insulating material.

It will ,be seen. that the current enters the fuse block from the line wire through one of the terminal connection pieces 7 and thence passes through the spring clip 8 to the terminal 18 of the adapter, thence passing to and through the internal metallic portion 11, thence through the fuse plug passing out through the button 10 to the head 14 of the screw 13, thence through said screw to and through the metallic member 16 to the terminal lug'17 of the adapter whence it passes to the other spring clip 8 and out through the corresponding terminal me1nber.7 to the line wire.

It will, of course, be understood that the various parts will be made in conformity with the usual style and arrangement of electrlcal apparatus of this-general description, the various metal parts being preferably made from stampings', in so far as possible, and itwill also be understood that various minor changes may be made With out departing from the spirit of my invention. I

Having thus described the nature and characteristic features of my invention what I claim as new and desire to secure by Letters Patent 1s:

1. An adapter for out out blocks comprisadapted to-be mounted in a cut out block designed for cartridge type fuses.

2. An adapter for out out blocks comprising .a receptacle adapted to receivea fuse' plug, said receptacle having an internal metallic Wall'forming one. of the electrical mounted in the base of said receptacle, :1

connections for said fuse plug, a suitably insulated metallic member mounted in the base of said receptacle forming the other electrical connection for said fuse plug, and a pair of terminal lugs extending from said 7 receptacle, said terminal lugs adapted to be mounted in a fuse block designed for cartridge type fuses and being electrically connected one to each of the interior metallic portions of said receptacle.

3. An adapter forcut out blocks compris-r ing a receptacle adapted to receive a fuse plug, said receptacle having an internal metallic wall forming one of the electrical connections for said fuse plug, a suitably insulated metallic member mounted in the base of said receptacle forming the other electrical connection for said fuse plug, and a pair of terminal lugs extending from said receptacle, said terminal lugs adapted to be mounted in a fuse block designed for cartridge type fuses and being electrically connected one to each of the interior metallic portions of said receptacle, the axis of said terminal lugs being offset. out of the plane of the axis of said receptacle.

4;. An adapter for out out blocks comprising a receptacle adapted to receive a fuse plug, said receptacle having an internal metallic wall, a block of insulating material mounted in the base of said receptacle, a centrally varranged metallic member mounted in said block and having an interiorly extending head, and a pair of terminal lugs extending from the sides of said receptacle, said terminal lugs adapted to be mounted in a fuse block designed for cartridge type fuses and being electrically connected one to each of the interior metallic portions of said receptacle.

' 5. An adapter for out out blocks comprising a receptacle adapted to receive a fuse plug. said receptacle having an internal metallic wall, a block of insulating material centrally arranged metallic member mounted in said block and having an interiorly extending head, and a pair of terminallugs extending from the sides of said receptacle,

said terminal lugs adapted to be mounted 115 in a fuse block designed for cartridge type fuses and being electrically connected one to each of the interior metallic portions of saidreceptacle, the axis of said terminal lugs being offset out of the plane of the axis of said receptacle.'

'6. An adapter for out out blocks comprising a receptacle adapted to receive a fuse plug, said receptacle having an interior metallic wall and an exterior shell of insulating material, a block of insulating material mounted in the base of said receptacle, a centrally arranged metallic member mounted in said block and having an inte-- riorly extending head, and -a pair of tennis nal lugs extending frcm the sides said signed my name in the presence of two receptacle, saidftcrminal bags adagtcid to be witnesses.

mounted in a .use block esigne or cartridge type fuses and being electrically. con- CHARLES A nected on'ejto each 0f the interior metallic .Witnesses:

portions of said receptacle. LILLIAN. H. NEVEIL,

In testimony whereof,, I have h rcunto WILLIAM S. ATCHISON.

copies 0t this pat ent may in obtzhml (or he cmeaeh, 13y likening the .Gonnlsflonerot Intent,

' Wumgton, D. G 

